Fushimi-no-miya Sadayuki-shinnō

Prince Sadayoshi Fushimi-no-miya (Fushimi-no-miya Sadayoshi-shinnō, 1779 – 1841) was a member of the Japanese imperial family during the Edo period and the 19th head of the Fushimi-no-miya lineage. His father was Prince Kunenyo Fushimi-no-miya (later deceased), and his childhood name was Kane-no-miya.

In 1779 (An'ei 8), upon the death of Emperor Go-Momo’en, he was considered as a candidate for the imperial throne. Later, in August of 1797 (Kansei 9), he received the imperial title and was named Sadayoshi. That same month, he came of age, was appointed governor of Uenosho, and elevated to the rank of sanpō (third court rank).

Following the death of his father, Prince Kunenyo, he succeeded as the head of the Fushimi-no-miya in 1802 (Kyo-wa 2). In 1804 (Bunka 1), he was appointed Junior Minister of the Army, and in 1805 (Bunka 2), he was promoted to the rank of ni-no-kami (second rank).

In 1811 (Bunka 8), he married Teruko, the daughter of Ichijō Terura. He was promoted to first rank (isshō) in the New Year of 1841 (Tempo 12), but he passed away the same year at age 67.

Regarding Prince Sadayoshi’s descendants, he fathered many sons, but only five reached adulthood. Notable among them were Prince Kuniya (1802–1872) and Prince Morishū. During the late Edo and Meiji periods, these sons remained alive.

His family included his first son, Prince Kuniya; Prince Sonpo (1804–1832), the head of the Seiren-in monastery and the 223rd head of the Tendai sect; and multiple daughters and siblings. His children encompassed several princesses and princes, many of whom married into other noble or religious families, linking him to various noble lineages and temple monasteries.

Furthermore, due to his bloodline, Empress Kōjun is considered a great-grandchild (grandchild’s grandchild), Emperor Akihito as a great-grandchild, and Emperor Naruhito as a great-great-grandchild.